During his twelve-year tenure with the company, he won three major championships promoted by it. One of them is the Strongest-K Tag Team Championship, which he first won at Club-K Super Overthrow on December 16, 2011, alongside his "Little Galaxy" stablemate Yuki Sato by defeating Ryuichi Sekine and Saburo Inematsu.[2] He has held the titles on one more occasion, this time alongside another Little Galaxy long time tag team partner and stablemate Shiori Asahi, with whom he won the titles again at KAIENTAI DOJO’s 10th Anniversary in Osaka on June 17, 2012, by defeating Saburo Inematsu and Yuji Hino.[5] Another championship he has held was the Chiba Six Man Tag Team Championship which he won alongside stablemates Yuki Sato and Shiori Asahi at Club-K Tour In Osaka on April 30, 2011, after defeating Kaji Tomato, Marines Mask and Taishi Takizawa to become the inaugural champions.[2] As for the UWA World Middleweight Championship, he won it at Club-K Super in Korakuen Hall on November 1, 2015, by defeating Kaji Tomato.[2] He participated in various tournaments of the promotion such as the Kaientai Dojo Tag League which he won in 2009 alongside Taishi Takizawa, the BO-SO Golden Tag Tournament, K-Metal League and Kaioh Tournament.[2]
Tonai retired from professional wrestling on May 6, 2018, at K-DOJO GWSP7 after a tag team match in which he teamed up with Taishi Takizawa in a losing effort against Kaji Tomato and his trainer Taka Michinoku.[6]
Tonai briefly wrestled in New Japan Pro Wrestling as a Kaientai Dojo developmental talent. He made his debut at NJPW Last Of CTU on August 26, 2007, where he teamed up with Apple Miyuki, Daigoro Kashiwa, Taku Anzawa and Teppei Ishizaka in a losing effort against the five rangers of the Control Terrorism Unit (CTU) stable.[9] He continued to make sporadic appearances for the company on the NEVER branch of events. His first appearance on one of these events took place at NJPW NEVER.9 ~ Road To The Super Junior Tournament on April 13, 2012, where he defeated Hiromu Takahashi in the first rounds. Two days later on April 15 he fell short to Madoka in the semifinals.[10] Tonai participated on two of the NJPW Tokyo Game Show 2012's nights. On the first one from September 21, he teamed up with Shiori Asahi as "Little Galaxy" to defeat Ryuichi Sekine and Saburo Inematsu. On September 23, Tonai picked up a win over Sekine in singles competition.[11] Tonai participated in the inaugural tournament of the NEVER Openweight Championship in which he fell short to Ryusuke Taguchi in the first rounds from November 15, 2012.[12] Tonai made several appearances at the NJPW Road To The New Beginning 2013. First one took place on the first night from February 2, where he teamed up with Suzuki-gun (Minoru Suzuki and Kengo Mashimo) in a losing effort to Chaos (Kazuchika Okada, Shinsuke Nakamura and Tomohiro Ishii). It was revealed that Tonai was briefly recruited by Michinoku into Suzuki-gun.[13] His last appearance for NJPW took place at NJPW New Japan Road #1 from February 11, 2013, where he teamed up with Suzuki-gun (Davey Boy Smith Jr., Lance Archer and Taka Michinoku) to defeat TenKoji (Hiroyoshi Tenzan and Satoshi Kojima), Captain New Japan and Tama Tonga.[14]